LT1761ES5-SD#PBF

The LT1761ES5-SD#PBF is a low-dropout linear voltage regulator manufactured by Analog Devices, belonging to the LT1761 series of 100 mA output, micropower LDOs. This device operates across a wide input voltage range up to 20 V and delivers a fixed, low-noise output in a space-efficient TSOT-23-5 package. Key performance characteristics include a dropout voltage typically in the low hundreds of millivolts at full load and an ultra-low quiescent current on the order of tens of microamps, which extends battery run-time in portable designs. Output noise is an essential attribute of this series, with spectral noise density as low as 20 µVRMS over a 10 Hz to 100 kHz bandwidth, making the regulator suitable for powering sensitive analog and RF circuits where supply integrity directly influences system performance.

Typical applications span battery-powered industrial instrumentation, portable medical diagnostics, handheld wireless modules, and high-reliability aerospace or defense electronics requiring extended temperature operation. In these systems, the device commonly supplies clean bias rails for low-noise amplifiers, high-resolution analog-to-digital converters, and phase-locked loops. The “ES5” suffix indicates an extended temperature range from –40°C to +125°C, and the “#PBF” marking confirms a lead-free, RoHS-compliant finish compatible with modern assembly standards. For procurement planning, Analog Devices maintains long product lifecycles and supports sustained availability on its power management portfolio, which helps reduce end-of-life risk in programs with extended qualification and deployment timelines. The TSOT-23-5 package provides high-density board mounting capability while retaining adequate thermal characteristics for the 100 mA output class.